| (19) |
 |
|
(11) |
EP 0 413 469 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.11.1991 Bulletin 1991/46 |
| (43) |
Date of publication A2: |
|
20.02.1991 Bulletin 1991/08 |
| (22) |
Date of filing: 01.08.1990 |
|
|
| (84) |
Designated Contracting States: |
|
DE GB |
| (30) |
Priority: |
03.08.1989 JP 200348/89
|
| (71) |
Applicant: NIPPON OIL COMPANY, LIMITED |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Sano, Akira
Kawasaki-shi,
Kanagawa-ken (JP)
- Shimizu, Hiroyuki
Shinagawa-ku,
Tokyo (JP)
- Shiraisha, Takeichi
Kawasaki-shi,
Kanagawa-ken (JP)
- Matsuura, Kazuo
Ota-ku,
Tokyo (JP)
- Yanahashi, Sinichi
Yokohama-shi,
Kanagawa-ken (JP)
|
| (74) |
Representative: Cropp, John Anthony David et al |
|
MATHYS & SQUIRE
100 Grays Inn Road
London, WC1X 8AL
London, WC1X 8AL (GB) |
|
| |
|
| (54) |
Process for preparing polyolefins |
(57) Polyolefins having better particle properties are obtained by polymerizing olefins
in the presence of a catalyst comprising a solid catalyst component and an organometallic
compound, the said solid catalyst component being prepared by reacting the following
components [I] and [II] and further reacting the resulting reaction product with the
following component [III]:
[I] a reaction product obtained by reacting:
(1) a silicon oxide and/or an aluminum oxide, and
(2) a titanium compound, or a titanium compound and a vanadium compound, and further
reacting the resulting reaction product with:
(3) an organoaluminum compound;
[II] a reaction product obtained by the reaction of:
(1) a magnesium halide, and
(2) a compound represented by the general formula Me(OR)nXz-n wherein Me represents an element of Groups I to IV in the Periodic Table, z represents
the valence of the element Me, n is 0 < n ≦ z, X is a halogen atom, and R is a hydrocarbon
residue having 1 to 20 carbon atoms; and
[III] a compound represented by the general formula Si(OR)mX4-m wherein R is a hydrocarbon residue having 1 to 20 carbon atoms, X is a halogen atom,
and m is 0 ≦ m ≦ 4.
